What is required to use the job storage feature?
Job storage requires a dedicated USB 2.0 flash drive with at least 16 GB free space installed in the rear host USB port. If using an HP Universal Print Driver (UPD), you must use version 5.9.0 or above. The USB flash drive holds the job storage jobs and must remain installed for the feature to work. (Page 44)
From the official HP Color LaserJet Pro MFP M477 Multifunction Printer manual, page 44
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